.span_2_of_3 {
    width: 100%;
}
.cont {
    display: block;
    float: left;
    margin: 1% 0 1% 0;
}

.col_1_of_single1 {
    display: block;
    float: left;
    margin: 1% 0 1% 1%;
}


.span_1_of_single1 {
    width: 24%;
    border: 1px solid #DDD;
}